(14,462kb pdf) Gladwin compares the previous work done on the architecture of the Flagstaff culture by Colton, Spicer, McGregor and Hargrave with tree-ring dating done by Douglass and McGregor and concludes that the tree-rings dates are in direct...

(16,080kb pdf) An analysis of skeletal remains found in Texas in the coastal region, examining specifically the skulls, arms, and legs. Clues pertaining to culture are extrapolated from composition and structure of the bones.

(9,367kb pdf) Critical analysis of similarities and differences in various tree-ring data obtained from the Medicine Valley in an attempt to reach a consensus as to the date of the ruins in the region.